Part Number: 400518-04
Revision: A4
Date: December 29, 2017
®
Epsilon EP-P Drive Reference Manual
Information furnished by Control Techniques Americas is believed to be accurate and reliable. However, no responsibility is
assumed by Control Techniques Americas. Control Techniques Americas reserves the right to change the design or operation of the
equipment described herein and any associated motion products without notice. Control Techniques Americas also assumes no
responsibility for any errors that may appear in this document. Information in this document is subject to change without notice.
Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any
form or by any means, electronic or mechanical, for any purpose, without the express written permission of Control Techniques
Americas.
Control Techniques Americas is part of the Control Techniques global organization, a Nidec Corporation business.
The following are trademarks of Control Techniques Americas and may not be reproduced in any fashion without written approval
of Control Techniques Americas: AXIMA, “Motion Made Easy”®, and Position Tracker
Control Techniques Americas is not affiliated with Microsoft Corporation, owner of the Microsoft, Windows, and Windows NT
trademarks.
This document has been prepared to conform to the current released version of the product. Because of our extensive development
efforts and our desire to further improve and enhance the product, inconsistencies may exist between the product and documentation
in some instances. Call your customer support representative if you encounter an inconsistency.
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Customer Support
Control Techniques Americas
7078 Shady Oak Rd.
Eden Prairie, Minnesota 55344
U.S.A.
Telephone: (952) 995-8000 or (800) 893-2321
It is Control Techniques’ goal to ensure your greatest possible satisfaction with the operation of our products. We are dedicated to
providing fast, friendly, and accurate assistance. That is why we offer you so many ways to get the support you need. Whether it’s by
phone, fax or email found on our website, you can access Control Techniques support information 24 hours a day, seven days a week.
FAX (952) 995-8129
You can FAX questions and comments to Control Techniques. Just send a FAX to the number listed above.
Website and Emailwww.controltechniques.com
Website: www.control techniques.com
If you have Internet capabilities, you also have access to technical support using our website. The website includes technical notes,
frequently asked questions, release notes and other technical documentation. This direct technical support connection lets you request
assistance and exchange software files electronically.
Manual conventions have been established to help you learn to use this manual quickly and easily. As much as possible, these conventions correspond to
those found in other Microsoft® Windows® compatible software documentation.
Menu names and options are printed in bold type: the File menu.
Dialog box names begin with uppercase letters: the Axis Limits dialog box.
Dialog box field names are in quotes: “Field Name.”
Button names are in italic: OK button.
Source code is printed in Courier font: Case ERMS.
In addition, you will find the following typographic conventions throughout this manual.
ThisRepresents
bold
italic
ALL CAPITALSDirectory names, file names, key names, and acronyms.
SMALL CAPSNon-printable ASCII control characters.
KEY1+KEY2
example: (Alt+F)
KEY1,KEY2
example: (Alt,F)
Characters that you must type exactly as they appear. For example, if you are directed to type
a:setup, you should type all the bold characters exactly as they are printed.
Placeholders for information you must provide. For example, if you are directed to type
filename, you should type the actual name for a file instead of the word shown in italic type.
A plus sign (+) between key names means to press and hold down the first key while you press
the second key.
A comma (,) between key names means to press and release the keys one after the other.
Reference Materials
The following related reference and installation manuals may be useful with your particular system.
•Epsilon EP Installation Manual (P/N 400518-01)
•Epsilon EP Connectivity Manual (P/N 400518-05)
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Safety Information
NOTE
WARNING
CAUTION
Safety Precautions
This product is intended for professional incorporation into a complete system by qualified persons. If you install the product
incorrectly, it may present a safety hazard. The product and system may use high voltages and currents, carry a high level of
stored electrical energy, or are used to control mechanical equipment that can cause injury.
You must give close attention to the electrical installation and system design to avoid hazards either in normal operation or in
the event of equipment malfunction. System design, installation, commissioning and maintenance must be carried out by
personnel who have the necessary training and experience. Read and follow this safety information and this instruction manual
carefully.
Qualified Person
For the purpose of this manual and product, a “qualified person” is one who is familiar with the installation, construction and
operation of the equipment and the hazards involved. In addition, this individual has the following qualifications:
Is trained and authorized to energize, de-energize, clear and ground and tag circuits and equipment in accordance with
established safety practices.
Is trained in the proper care and use of protective equipment in accordance with established safety practices.
Is trained in rendering first aid.
Enclosure
This product is intended to be mounted in an enclosure that prevents access except by qualified persons and that prevents the
ingress of contamination. This product is designed for use in an environment classified as pollution degree 2 in accordance with
IEC664-1. This means that only dry, non-conducting contamination is acceptable.
Setup, Commissioning and Maintenance
It is essential that you give careful consideration to changes to drive settings. Depending on the application, a change could
have an impact on safety. You must take appropriate precautions against inadvertent changes or tampering. Restoring default
parameters in certain applications may cause unpredictable or hazardous operation.
Safety of Machinery
Within the European Union all machinery in which this product is used must comply with Directive 89/392/EEC, Safety of
Machinery.
The product has been designed and tested to a high standard, and failures are very unlikely. However the level of integrity
offered by the product’s control function – for example stop/start, forward/reverse and maximum speed – is not sufficient for
use in safety-critical applications without additional independent channels of protection. All applications where malfunction
could cause injury or loss of life must be subject to a risk assessment, and further protection provided where needed.
Identification of Safety Information
Safety related information through out this manual is identified with the following markings.
“Warning” indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.
“Caution” indicates a potentially hazardous situation that, if not avoided, may result in minor or moderate injury.
For the purpose of this manual and product, “Note” indicates essential information about the product or the respective part
of the manual
Throughout this manual, the word "drive" refers to an Epsilon EP-P drive.
Failure to follow safe installation guidelines can cause death or serious injury. The voltages used in this unit can cause
severe electric shock and/or burns, and could be lethal. Extreme care is necessary at all times when working with or
adjacent to this equipment. The installation must comply with all relevant safety legislation in the country of use.
Supply isolation device
The AC supply or high voltage DC supply must be removed from the drive using an approved isolation device or disconnect
before any servicing work is performed, other than adjustments to the settings or parameters specified in the manual. The
drive contains capacitors which remain charged to a potentially lethal voltage after the supply has been removed. Allow at
least 6 minutes for Epsilon EP206/209/216 and 3 minutes for Epsilon EP202/204 after removing the supply before carrying
out any work which may involve contact with electrical connections to the drive.
Products connected by plug and socket
A special hazard may exist where the drive is incorporated into a product which is connected to the AC supply by a plug
and socket. When unplugged, the pins of the plug may be connected to the drive input, which is only separated from the
charge stored in the bus capacitor by semiconductor devices. To avoid any possibility of electric shock from the pins, if they
are accessible, a means must be provided for automatically disconnecting the plug from the drive (e.g., a latching
contactor).
Grounding (Earthing, equipotential bonding) - High Leakage Current
The drive must be grounded by a conductor sufficient to carry all possible fault current in the event of a fault. This
equipment has high earth leakage current. You must comply with local safety regulations with respect to minimum size and
special installation requirements on the protective earth conductor for high leakage current equipment. The ground
connections shown in the manual must be followed.
Fuses
Fuses or over-current protection must be provided at the input in accordance with the instructions in the manual.
The drive alone does not provide branch circuit protection. Branch circuit protection must be provided in accordance with
the National Electrical Code and any additional local codes.
Isolation of control circuits
The installer must ensure that the external control circuits are isolated from human contact by at least one layer of
insulation rated for use at the applied AC supply voltage. External control circuits identified as PELV circuits do not need
this isolation when they are completely within a zone of equipotential bonding, generally within a single enclosure or group
of enclosures bonded together.
AC Power Connections
Motor Connections
24 Vdc Logic Power Supply Connections
Digital I/O Connctor (J3)
DeviceNet Connector (J9)
(EP-IDN or EP-PDN only)
Serial
Connectors (J2)
Ethernet
Connector (J4)
(EP-Pxx only)
Diagnostic Display
Shunt Connector (J8)
Reset Button
Encoder Feedback Connector (J6)
Sync Input Connector (J10)
Analog/Sync Output
Connector (J5)
1.1Epsilon EP Drive
The Epsilon EP drive is a stand-alone, fully digital brushless servo drive designed and built to reliably provide high
performance and flexibility without sacrificing ease of use.
The use of State-Space algorithms make tuning very simple and forgiving. The drives are designed to operate with up to a
10:1 inertia mismatch right out of the box. Higher (50:1 and more) inertial mismatches are possible with two simple parameter
settings.
The Epsilon EP drive can be quickly configured to many applications in less than 5 minutes with PowerTools Pro software on
a PC running Windows® 98, 2000, XP (32-bit) or Vista (32-bit).
Complete diagnostics are provided for quick troubleshooting. A diagnostic display on the front of the drive informs the user of
the operational or fault status. The last 10 faults are stored in non-volatile memory along with a time stamp for easy recall.
Model Number, Part Number,
Revision and Serial Number Label
24 Vdc Logic Power
Supply Connections
Status/Diagnostic Display
Motor Power Connections
Reset Button
AC Power Connector
Serial
Connectors (J2)
Ethernet Connector (J4)
(EP-Pxx only)
DeviceNet Connector (J9)
(EP-PDN only)
Digital I/O Connector (J3)
Encoder Feedback Connector (J6)
Sync Input Connector (J10)
Analog/Sync Output
Connector (J5)
Profibus Connector (J13)
(EP-PPB only)
Shunt Connector (J8)
24 Vdc Logic Power
Supply Connector
Status/Diagnostic Display
AC Power Connections
Motor Power Connections
Reset Button
Serial
Connectors (J2)
Ethernet Connector (J4)
(EP-Pxx only)
Ethernet Connector (J9)
(EP-PDN only)
Digital I/O Connector (J3)
Model Number, Part Number,
Revision and Serial Number Label
Encoder Feedback Connector (J6)
Sync Input Connector (J10)
Analog/Sync Output
Connector (J5)
Profibus Connector (J13)
(EP-PPB only)
Figure 3:Epsilon EP-216 Drive Feature Location
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2Operational Overview
This section provides a complete functional description of the Epsilon EP-P drive. It is intended to provide you, the user, with a
thorough understanding of all operations. The description includes references to many Epsilon EP-P drive parameters which
can be displayed and/or edited using PowerTools Pro software, or through any Modbus interface.
The Epsilon EP-P drive allows the user to set up 100 different Indexes, Jog functions and a Home. The Epsilon EP-P drive
provides fifteen digital inputs and eight digital outputs.
2.1Software Interface
The Epsilon EP-P drive is set up using PowerTools Pro software. PowerTools Pro is an easy-to-use Windows® based setup
and diagnostics tool. It provides the user with the ability to create, edit and maintain the drive’s setup. You can download or
upload the setup data to or from a drive. The setup data can also be saved to a file on the PC or printed for review or
permanent storage.
2.2PowerTools Pro Setup Software
PowerTools Pro is designed to be the easiest-to-use software available for single axis motion controllers.
Features
•“Hierarchy Tree” for quick navigation to any setup view
•Simple I/O function assignments
•Powerful online diagnostic capabilities
•Programming
Figure 4:Hierarchy Tree
The “Hierarchy Tree” (shown above in the left side) contains expandable groups of parameters. The groups can be expanded
and contracted just like folders in Windows® Explorer. Left click on a view name in the Hierarchy Tree will display that view on
the right side of the computer screen.
To setup a drive the user simply steps through the Hierarchy Tree from top to bottom starting with the Setup view. Simple
applications can be setup in a matter of minutes.
2.3How Motion Works
The Epsilon EP-P drive provides six types of motion: jogging, homing, indexing, gearing, camming, and torque mode. The
drive will be either in velocity mode or torque mode. What this means is that while the drive is in torque mode, the other types
of motion cannot run. If the other types of motion are active on either profile, the torque mode may not run. It is possible to run
two different velocity mode types of motion at the same time. For instance, gearing could be running on profile zero while an
index is running on profile one. Note that the same instance of a motion type may not run on both profiles at the same time.
This means that while index 0 is running on profile zero, it may not run on profile one. But while index 0 is running on profile
Please note that Indexes and Jogs can be run simultaneously by using the two Profiles, however, Gearing or Camming can only run on one
profile at a time. This means that two indexes or two jogs can run at the same time, but gearing or camming can not be run on multiple profiles
simultaneously.
The Positive direction parameter affects all motion types by specifying which direction of motor revolution (CW or CCW) is considered motion
in the “+” direction.
2.4How Jogging Works
Jogging produces rotation of the motor at controlled velocities in a positive or negative direction.
Assignments to jogs are level sensitive such that when the jog input is turned on, jogging begins and continues jogging until the jog input is
removed.
Each jog has its own acceleration and deceleration ramp along with a specified velocity. Jogging has no distance parameter associated with it.
If trying to move a specific distance or to a known position, then an index is used.
Jog velocity can be changed on the fly with a negative value reversing the direction. The velocity transition will use the deceleration or
acceleration parameters.
Figure 5:Jog View
2.5How Home Works
The Home is used in applications in which the axis must be precisely aligned with some part of the machine. The Home is initiated in one of
three ways: with the Initiate Destination function found in the Assignments view, through a program, or with the Online tab. A Home or Define
Home is required to set the Absolute Position Valid so that any index to absolute position can work.
The Epsilon EP-P drive can home the motor to an external sensor, the motor’s encoder marker pulse, or to a sensor and then to the encoder
marker pulse.
The figure above show a basic home function using a ball screw. This example uses most of the setup features in the PowerTools Pro Home
Figure 6:Basic Home Function, Example
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view.
NOTE
2.5.1Home Sequence
1.Back off the sensor, if on the sensor. (This step is optional).
2.Move to the external home sensor to establish a home reference point.
3.Next it will move to the Offset position.
4.Then the command and feedback positions are set to the value entered into the End of Home Position.
Homing to the motor’s encoder marker will establish the most accurate and repeatable home position. This method will
position the motor relative to the location of the rising edge of the encoder marker pulse. Most applications will use a sensor
and marker to find an accurate home position in the vicinity of the home sensor.
Several parameters affect how the Home function operates. Each of these parameters are explained in detail on the following
pages.
The Home function will NOT be initiated when any other motion command is in progress.
2.5.2Establishing a Home Reference Position
The first step in setting up a home is to select the desired home reference type. The Home Reference type selected
determines how the Home Reference Position is established. PowerTools Pro allows selection of one of three different Home
Reference types: Sensor, Marker, or Sensor then Marker.
Sensor
Selecting Sensor means the rising edge of the Home Sensor input function is used to establish the home reference position.
Figure 7:Sensor Home Reference Position
Marker
Selecting Marker means the rising edge of the motor’s encoder marker channel is used to establish the reference position.
Figure 8:Marker Home Reference Position
Sensor then Marker
Selecting Sensor then Marker means the reference position is established using the first marker rising edge after the drive
sees the rising edge of the Home Sensor input function.
Figure 9:Sensor then Marker Home Reference Position Example 1
NOTE
NOTE
Marker
Sensor
>800 µsec
Direction of Travel
2.5.3Accuracy and Repeatability
The accuracy is one trajectory update rate. For example - if the trajectory update rate is set to 800 s then the accuracy will be 800 s, if the
trajectory update rate is set to 1.6 ms then the accuracy will be 1.6 ms.
The amount of accuracy the application requires will determine the Home Reference type selected. Homing to an external sensor will only
establish a repeatable home position within 0.04 revolutions at 3000 RPMs (800 sec sensor capture interval).
The data above assumes the use of a perfectly repeatable home sensor.
In Sensor then Marker applications, the marker must be at least 800 sec after the rising edge of the sensor input to be considered a valid
marker pulse, see
At 1000 RPM, the motor will travel 0.0133 revolutions (or 4.8°) in 800 sec.
Figure 10.
Figure 10:Sensor then Marker Home Reference Position Example 2
The Home Sensor must be “On” for at least 800 sec to guarantee that it will be recognized.
Sensor Min.
On Time
Sensor
800 μsec
Figure 11:Sensor then Marker Home Reference Position Example 3
2.5.4Home Offset
The Home Offset is the distance from the home reference position to the final stopping point at the end of the homing sequence. Regardless of
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the value you enter for the Offset or which Home Reference type you choose, there is always an offset inherent in the homing
process.
The user may either specify a desired offset or allow the drive to calculate an offset automatically. The drive calculates an
offset that guarantees that the motor will not have to backup to get to the offset position. This is very convenient for
unidirectional applications.
The Calculated offset is the distance travelled during deceleration ramp from the home velocity to a stop plus the distance
travelled at the home velocity for 800 usec. This extra distance is used to guarantee that the motor will not need to backup
after the deceleration ramp.
The Specified offset allows the user to choose an exact offset from the home reference. Once the home reference is detected,
the drive will do whatever is necessary to reach the offset position. This may be as simple as a deceleration to a stop, a
continuation at speed followed by a deceleration to a stop, or a deceleration followed by a move in the opposite direction.
To enter a Specified offset, select the Specified offset radio button. PowerTools Pro always displays the calculated offset value
as a reference.
Offset Examples
With a Calculated offset if the home reference is detected before the axis has reached its peak velocity, the axis will still
continue to the precise offset position, see
Figure 12.
Figure 12:Calculated Home Offset, Peak Velocity Not Reached
If the home reference is detected after the axis has reached its peak velocity, the axis will decelerate to the precise offset
position.
Calculated
Home Offset
Figure 13:Calculated Home Offset, Peak Velocity Reached
Two examples below show operation when the specified offset is greater or lesser than the calculated offset. This causes the
axis to continue on at speed before decelerating and stopping at the offset position, or backing up after the home sensor.
Figure 14:Specified Home Offset, Greater than Calculated Offset
Specified
Offset
Specified
Offset
Figure 15:Specified Home Offset, Backup Required
2.5.5End of Home Position
The End of Home Position (End Posn) defines the home position in relation to the machine’s coordinate system. At the completion of the
home, the value of the End of Home Position is put into the command position.
2.5.6Home Limit Distance
This parameter places an upper limit on the incremental distance the motor will travel during the home.
If no reference is found, the system will decelerate and stop at the limit distance. The Home Limit Distance Hit function will be activated if the
home stops at the limit distance without finding the reference. Additionally, the Home.CommandComplete function will not turn “On” if the limit
distance is hit.
2.5.7Home Examples
Linear Application
In this example, the system uses an external sensor and the motor’s encoder marker channel to establish a Home Reference Position. This is
the most accurate and most common way to home.
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Gear Reducer
Velocity
Time
Sensor
Back off
Sensor
Marker
+ 100
- 100
+ 100
External
NT
Motor
Home Sensor
-
Direct
ion
+
Figure 16:Home to Sensor and Marker, Example
When the drive sees the Home Initiate, it accelerates the motor to the Home Velocity.
The motor continues at that velocity until it first senses the Home Sensor input. It continues at the same velocity until the
motor’s encoder marker channel is sensed. The rising edge of the motor’s encoder marker channel is used to establish the
reference position. Once the home reference is detected, the motor decelerates to a stop and moves to the offset position.
Home Sequence
1.If on sensor then back off (if enabled)
2.Search for sensor
3.Search for marker
4.Go to offset (2.0 Revs)
5.Set feedback position equal to End of Home Position
This example uses an external sensor and the motor’s encoder marker pulse to establish a home reference position.
Figure 19:Home Sensor and Marker then Offset, Example
When the drive sees the rising edge of the Home Initiate function, it accelerates the motor to the Home Velocity. The motor continues at that
velocity until it first senses the Home Sensor input. The motor continues on at the home velocity until the marker is activated.
The rising edge of the motor’s encoder marker channel is used to establish the reference position.
After sensing the rising edge of the motor’s marker channel, the drive will continue moving and will decelerate to a stop at the specified offset
position.
Figure 20:Home Velocity Profile
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2.6How Indexes Work
Velocity
Time
Acceleration
Deceleration
Run at Velocity
An index is a complete motion sequence that moves the motor a specific incremental distance or to an absolute position. This
motion sequence includes an acceleration ramp to a programmed velocity, a run at velocity, and a deceleration ramp to a stop.
Figure 21:Index Motion Sequence
Figure 22:Indexes View
Indexes use acceleration and deceleration ramps which may or may not reach the specified velocity depending on the total
distance and the ramp values. For example, a short move with long acceleration and deceleration ramps may not reach the
target velocity entered.
Indexes cannot be initiated when any other motion (jogging, homing, or program) is in progress. Indexes can be aborted with
the Stop destination found in the Ramps group on the Assignments View.
The Epsilon EP-P supports eight types of indexes: absolute, correction, incremental, posn track cont., posn track once,
registration, rotary plus and rotary minus.
2.6.1Absolute vs. Incremental
The difference between absolute and incremental indexes is that absolute indexes move to a specific absolute position and
incremental indexes move the motor a specific distance. The following figures and explanations demonstrate this concept.
Absolute indexes are used in applications where the motor must travel to a specific position, regardless of where the motor is when the index
is initiated.
The drive calculates the distance required to move to the specified position from the current position.
Absolute Index
Start Position = 1 Rev
Index Position = 5 Revs
Figure 23:Absolute Index Example 1
In the example above, the current position is 1 rev. If this index is initiated, the motor will travel to a position of 5 revs no matter where it is
sitting before the move. From 3 revs, it will travel 2 revs to finish at 5 revs. If the absolute index to 5 revs is initiated a second time immediately
after the index, no motion will occur because the motor will already be at a position of 5 revs.
The direction of an Absolute Index is determined by the starting position and the absolute index position. If the starting position for the above
index is 9 revs, then the motor will rotate in the negative direction to end up at 5 revs. The figure below shows this.
Absolute Index
Start Position = 9 Revs
Index Position = 5 Revs
Figure 24:Absolute Index Example 2
Absolute indexes with Rotary Rollover enabled will take the shortest path to the position entered in the index position parameter.
Absolute indexes move to positions relative to where the machine was homed using the Home, or the DefineHome destination.
Incremental Indexes
An incremental index will move the motor a specified distance in the + or - direction regardless of the starting position. The direction of the
incremental index motion is determined by the sign (+ or -) of the Index Distance parameter.
Incremental Index
Start Position = 1 Rev
Index Distance = 2 Revs
Figure 25:Incremental Index Example
In the example above, the motor starts at 1 rev, travels a distance of 2 revs and stops at 3 revs. If the same index is initiated a second time, the
drive would move the motor another 2 revs to a position of 5 revs. If initiated a third time, the motor would travel another 2 revs to a final
position of 7 revs.
Figure 26 shows this operation.
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Incremental Index
Start Position = 1 Rev
Index Distance = 2 Revs
Figure 26:Incremental Index Example 2
Correction Indexes
A Correction index is intended to continuously run on the second profile correcting any position drift. It will adjust the motor
position based on changes to it's index.#.dist parameter. The Correction indexes use incremental distance values. Updates to
the index distance while the correction index is executing will take effect immediately by recalculating the index on the fly.
Another words, if this index is in progress and the distance value is changed, the move profile instantaneously recalculates
based on the index's current position, speed and acceleration. Once the Correction index is initiated it will remain active until
stopped by the user with the Profile.#.MotionStop function.
Example: Correction index distance sources are user program calculations, fieldbus inputs or analog input values. The index
distance value can be updated via Fieldbus, by simply writing to the index distance parameter. If the analog input's Destination
Variable is set to the Index.#.Dist parameter, the index's distance value will be updated by the Analog Input. This can be set to
a automatic refresh using the Analog Input view
Posn Tracker Cont and Posn Tracker Once Indexes
Posn Tracker Cont and Posn Tracker Once are indexes which expect their position values to be dynamically changed while
executing. Position Tracker indexes use absolute position values. Posn Tracker Cont index once initiated, will remain active
until stopped by the user with the Profile.#.MotionStop function. The Posn Tracker Once index will accept position changes
until the target position is reached, at which point the index is complete.
The index 's position value can be updated via fieldbus, by simply writing to the index position parameter. Posn Tracker
Indexes are used to follow dynamic changes to the end point of the index prior to and during the index motion. If the analog
input's Destination is set to an Index.#.distance, the index's position value will be updated by the Analog to Position scaling
found in the Analog Input view.
Posn Tracker also accepts on the fly changes to index velocity, acceleration and deceleration. The index is recalculated on the
next trajectory update.
Registration Indexes
A Registration Index is used in applications where the motor must move until an object is detected and then move a specific
distance from the point of detection, such as finding a registration mark and moving a distance beyond.
The Registration Index consists of two parts. The first part accelerates the motor to the target velocity and continues at this
velocity until it receives a registration trigger (sensor or analog). Upon receipt of a registration trigger, the registration offset will
be executed at the target velocity. The Sensor Limit Distance Hit source can be used to turn on an output, if a sensor input or
analog limit is not received within the Limit Distance. A registration window can also be used to determine the validity of a
registration trigger. If a registration trigger is received outside of the registration window, it will be ignored.
Rotary Plus and Rotary Minus Indexes
Rotary Plus and Rotary Minus Indexes provide forced directional control of moves to absolute positions. The position entered
for a Rotary Plus or Minus type index must be within the rotary range (i.e. 0
parameters function the same as they do with absolute indexes. An Absolute Index is a direct move to a specific position,
regardless of the starting point. A Rotary Plus Index moves to the specified position, but is forced in a positive direction.
Similarly, a Rotary Minus index moves to the specific position, but is forced in a negative direction.
Rotary Plus and Minus Indexes are usually used in rotary applications, therefore the rotary rollover feature on the Setup Position view in the PowerTools Pro software must be enabled to use them.
1.In the following examples the term “D” = (absolute position specified) - (current position). If “D” is negative,
motion in the negative direction is implied.
2.In the following examples the Rotary Rollover parameter on the Setup - Position view is set to 360.00°. This
means that with each revolution of the motor (or rotary table), feedback will count up to 359.99°, then roll over
to Ø°.
Indexes with Rotary Rollover Enabled
Incremental move distances can be outside of the rotary rollover range. See the "Setting Up Parameters" chapter for an
explanation of Rotary Rollover.
Example 1: If the starting position is at Ø° and 720° is the specified distance, an Incremental index would move 2 revolutions
in the positive direction. At the completion of this index the motor position would be Ø°.
Absolute indexes will take the shortest path to the specified position. Absolute index positions must be within the rotary
Example 2: If the starting position is at 90° and 80° is the specified position, an Absolute index would travel 10° in the negative direction. At
the completion of this index the motor position would be 80°.
Example 3: If the starting position is 45° and 315° is the specified position, an Absolute index would travel 90° in the negative direction
because that is the shortest path between 45° and 315°.
Rotary Plus indexes will move to the specified position and are forced in a positive (or plus) direction. Rotary Plus index distances must be
within the rotary rollover range.
Example 4: As in example 2 above, the starting position is at 90° and 80° is the specified position. A Rotary Plus index would travel 350° in
the positive direction. At the completion of this index the motor position would be 80°.
Example 5: If the starting position is 10° and the specified position is 350°, a Rotary Plus index will travel 340° in the positive direction.
Rotary Minus indexes move to the specified position, but are forced to travel in the negative (or minus) direction. Rotary Minus index positions
must be within the rotary rollover range.
Example 6: As in examples 2 and 4 above, the starting position is at 90° and 80° is the specified position. A Rotary Minus index would travel
10° in the negative direction. At the completion of this index the motor position would be 80°.
Example 7: If the starting position is 15° and the specified position is 270°, a Rotary Minus index would travel 105° in the negative direction.
2.7How Communications Work
2.7.1Configuring Communication
Before attempting to upload or download a configuration file using PowerTool Pro, the software must be configured to the correct
communication settings for the intended communication connection. The Epsilon EP-P drive supports both RS-485 serial communication
connections (J2) and Ethernet communication (J4) connection, on the front of the drive.
When downloading or uploading a selected configuration file that is open in PowerTools the communication scanner will only scan the
configuration file’s Modbus ID and Ethernet address (unless Ethernet change address is clear). Once a connection is established, that
connection (Comm port used, port number, modbus ID and Ethernet address) is saved, a second download, upload or reconnect will bypass
the scanner and use this previously defined communication path. To change the communication path use the Change Path toolbar button.
The communication connection may be selected in the Upload Drive Configuration, Download to Device IDx or the Change Path dialog boxes.
From the
see below.
2.7.2Upload Drive
Uploading is the process of reading information back from the drive to the PowerTools Pro configuration file views.
To upload information from a drive, click on the Upload All button, on the PowerTools Pro toolbar or from the Device menu,
choose Upload All or Upload Drive. The Upload Drive Configuration dialog box will open, all communication connections are
scanned and the results appear. In
Drive Configuration dialog box contains the following information for every drive found:
Device menu, choose Upload Drive, Download or Path Change to open the dialog box or the toolbar buttons can also be used,
Figure 27, it shows that one drive on COM 1 was found, an Epsilon EP204-P drive. The Upload
•Ip Address/COM
•Modbus Address ID
•Drive Type
•Module Type
•Communication Options
•Base/Drive FW Revision
•Module FW Revision
•Module Serial Number
•Drive Serial Number
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.
Figure 27:Upload Drive Configuration Dialog Box
Select the drive to upload and click Upload.
2.7.3Downloading
Downloading is the process of sending the configuration created with PowerTools Pro from the PC to the drive. Changes
made in PowerTools Pro will not take effect until the information has been downloaded or the Update to RAM button has been
clicked.
To download information to a drive, click the Download button on the PowerTools Pro toolbar or from the Device
menu, choose Download. The Download to Device IDx (x equals the modbus address) dialog box will open, all
communication connections are scanned and the results appear. In
found, it’s a Epsilon EP204-P drive. The Download Drive Configuration dialog box contains the following
information for every drive found:
This function allows the user to change the drive and Ip address/Com port used for download and upload. It is used when the user has already
selected one Ip Address/Com port and wishes to change to another.
The dialog box provides the user with communication information available on the Modbus and Ethernet network. This information contains:
•Ip Address/COM
•Modbus Address ID
•Drive Type
•Module Type
•Communication Options
•Base/Drive FW Revision
•Module FW Revision
•Module Serial Number
•Drive Serial Number
Figure 29:Change Path Dialog Box
Select the drive in the list and then click OK. The communication connection path will then be displayed in the status bar at the bottom of
PowerTools Pro window.
16Epsilon EP-P Drive Reference Manual
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